Feedeeick a



(No Model.)

P. A. GARDNER.

STEAM BOILER.

No. 405,209. Patented June 11, 1889.

Zuni/0%} ATTORNEY N. PETERS. Phnlo-Lilhugnphnr. Washmgion, n. c.

blow-off pipe.

UNITED STATES PATENT OFFICE.

FREDERICK A. GARDNER, OF CATSKILL, NEW YORK, ASSIGNOR TO F. A.

GARDNER & 00., OF SAME PLACE.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 405,209, dated June 11,1889.

Application filed November 1, 1888.

To all whom it may concern:

Be it known that I, FREDERICK A. GARD- NER, a citizen of the UnitedStates, residing at Catskill, in the county of Greene and State of NewYork, have invented new and useful Improvements in Steam-Boilers, ofwhich the following is a specification.

This invention relates to an improvement in steam-boilers, as set forthin the following specification and claims, and illustrated in theaccompanying drawings, in which Figure 1 is a section of a steam-boileralong the line a; m, Fig. 2. Fig. 2 is a section along the line y y,Fig. 1, and looking upward in lzhe direction of the arrow opposite tothat Similar letters indicate corresponding parts.

In the drawings, the letter D indicates a drum, which is provided withthe stand-pipe O. A indicates a feed pipe, and B is a The feed-pipesupplies water to a stand-pipe O and to the drum D. Thecirculating-pipes E F communicate with the stand-pipe and with the drum.The pipes E are secured to the stand-pipe at a higher level than thepipes F. The parts or branches of the pipes E F which extend from thestandpipe are bent or provided with elbow-joints G, so as to increasethe length of such parts or branches, and thus increase the surface ofsuch pipes which is exposed to the heat or fire. A grate II is adaptedfor the support of fuel which can be fed onto the grate through thefire-door I. The ash-pit can be cleaned through the door K.

The grate H is shown as closing the bottom of a fuel-magazine S. Atoothed ringL is secured to the grate, and a cog-wheel M and crank N canbe made to rotate or oscillate the ring L and grate H when it is desiredto distribute the fuel evenly over the grate or to remove the ashes fromthe fire. The grate is rotatable or oscillatory, being supported on asleeve 0 surrounding the stand-pipe O. The products of combustion passto the chimney Q by way of the flues P,which extend through the drum D.Openings R may also be provided through which the products of combustionmay pass about the drum and within the outer shell T to the chimney Q.

Serial No. 289,742. (No model.)

From the construction shown it will be noticed that the water in thehorizontal branches of the circulating-pipes E F is exposed moredirectly to the heat than the water in the stand-pipe C, andconsequently the water in the pipes E F will pass from such pipes intothe drum D, and will be replaced by Water passing from the stand-pipe Ginto the circulating-pipes E F, so that a circulation of the water iseffected which materially facilitates the production of steam. The shellT is shown provided with hand-holes having covers U. These hand-holescorrespond to the flues P. Said holes enable the flues to be readilycleaned, since by removing the covers U and passing cleaning-rodsthrough said holes and flues any soot or impurity in the flues can beremoved therefrom. I This cleaning can be done even while the boiler isin use.

What I claim as new, and desire to secure 'by Letters Patent, is-

1. In a steam-boiler, the combination, with a stand-pipe 0, having afeed-pipe entering its lower end, of the drum D, arranged above andhaving the stand-pipe entering its bottom, the circulating-pipes ofelbow shape, leading from the stand-pipe to said drum, and the flues Ptraversing said drum, substantially as described.

2. In asteam-boiler, the drum D, the standpipe entering its bottom, theelbow-shaped circulating-pipes E F, leading from the standpipe to thedrum, and the flues P traversing the latter, substantially as described.

3. A steam-boiler composed of the shell T, the drum D, arranged abovethe stand-pipe C, the upper end of which communicates with the drum, thecirculating-pipes leading from the stand-pipe into the drum, thefire-place H, the fire-flues P, extending through the drum D, andsmoke-stack Q, leading from shell T, substantially as described.

4. The combination, with the shell T, the drum D, and the stand-pipe C,of the grate H, provided with a sleeve which fits the standpipe, thefuel-magazine S, and means, substantially as described, for imparting tothe grate a revolving motion.

5. A steam-boiler composed of the drum D, arranged above the stand-pipeO, the upper end of which enters the drum D, the eireulat- In testimonywhereof I have hereunto set ing-pipes leading from the stand-pipe intomy hand and seal in the presence of two subthe drum, the fire-place H,the fire-fines I, scribing Witnesses.

extending through the drum D, the shell T, FREDERICK A. GARDNER. ['L.having hand-holes for the fines, and smoke- \Vitnesses:

stack Q, leading from the shell '1, substantially HENRY D. SHORES,

as described. \V. IRVING JENNINGS.

